Krzysztof Z. Gajos, Katherine Everitt, Desney S. Tan, Mary Czerwinski, Daniel S. Weld
While proponents of adaptive user interfaces tout potential performance gains, critics argue that adaptation's unpredict- ability may disorient users, causing more harm than good. We present a study that examines the relative effects of predictability and accuracy on the usability of adaptive UIs. Our results show that increasing predictability and accuracy led to strongly improved satisfaction. Increasing accuracy also resulted in improved performance and higher utiliza- tion of the adaptive interface. Contrary to our expectations, improvement in accuracy had a stronger effect on perform- ance, utilization and some satisfaction ratings than the im- provement in predictability. AUTHOR KEYWORDS Adaptive interfaces, predictability, accuracy, user study ACM Classification Keywords H5.2 Information Interfaces and Presentation: User Inter- faces – Interactions Styles, Evaluation/Methodology